muret



L. C. MURET.

AGRICULTURAL TRACTOR.

APPLICATION mm JULY7,1919.

Patented Apr. 11, 1922 4 SHEETS-SHEET t.

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lll'lT Ill] mllllllll l L. C. MURET.

AGRICULTURAL TRACTOR.. 1,412,366 APPLICATION FILED mum. l9l9. PatentedApr 11, 1922.

4 SHEETSSHEET 2- L. C. MURET. AGRICULTURAL TRACTOR. APPLICATION FILEDJULY? 1919.

Patented Apr. 11, 1922.-

4 SHEETS SHEET 3.

Ill-ll! Q m k \Mv ihiiiiiniiiNiih n I 7 iw {UNI ED ATES PA VENT oFFicLEON CHARLES MURET, OF NICE, FRANCE.

AGRICULTURAL rrteoro'n;

' a Application filed July 7,

To (ZZZ .whom it may concern: r r

Be it known that LLnON CHARLnsMuRnT,

a :citizen of the French Republic, residing at Nice, Alpes Maritimes, inState of France,

7 Specification of'Letters Patent.

have invented certain'new and useful 1m provements in AgriculturalTractors and I-do hereby declare the following to be a full, clear, andexact description of the invention, such as will enable others skilledin the art to which is appertains to make and use the same. 7

- The present invention relates to an agricultural' tractor and theprincipalqobjectsof the invention are'to obtain first, a convenientresilient suspension, second, muinof flexibilityin the elements for theoperation of the tractor, three, a simple and rapid'transformation ofthe tractor for the purpose'of travelling on roads.

"In the accompanying drawings, a preferredform of the tractor formingthe subject'of this invention is illustrated, Figure 1 showing a sideview of'the' complete tractor,

a maxi-' Figures 2 and-3 respectively views in plan and elevation of theadjusting system for the tractor chains and a part of the suspensiondevice, F igures4, '5, 6 and 7 showing details of arrangement of themeans for changing speed and reversing, Figure 4 being a view in"elevation-partly in section, Figure 5 being'a;fvertical sectional viewon the line of Figure 4, Figure 6 being a sectional view through-theaxis of a motor shaft and Figure 7 being a diagram of the various'comhinations employed for manoeuvering the tractor. Figures 8, 9, 10and 11 show-on en'larged'scale the details of the'elements by meansof-whichthe tractor chains are modified fol-travelling on the roads;Figures 8 and 10 being views in elevation and Figures 9"and 11 showingsectional views of the same on the vertical plan y- 1 -in Figures 8 and10.

Upon the rigid frame 1 are fastened the motor 2 and the drivers seat 3.The hand levers and pedals for operating the tractor are placed withinreach of the hand of the driver as he is seated on this seat. The Wheelcarriage comprises a front bogie, a rear carriage and two intermediateaxles.

The front 'bogie (Figure 1) comprises two flat rimmed wheels, each ofwhich is loosely mounted on an axle 5 upon which is fitted a lever 6pivotally mounted upon one end of the trunnion 7 fixed upon the front1919. Serial No. 309,103.

bracket 8 of the stretching frame 9. The lever 6 is secured at itsopposite end to one end of the transverse leaf spring 12 which is fixedin the middle to the stretching frame 9. This frame 9 is mounted on thefront end of the main frame 1 in such a manner that it may be made'toslide with respect to this frame and may be adjusted in position bymeans of screws 13, may be stretched.

The rear carriage comprises two driving wheels 15 with rims 15 providedwith teeth adapted for operative engagement with the tractor chains.These wheels are loosely mounted upon the rear axle 16, which isattached to the frame 1 by struts 17 and springslS shown in dotted linesin Figure 1. The tractor chains 1% are carried aroundthe front and rearwheels at each side of the frame.

Added to the front and rear carriages are disposed two intermediatecarriages which are similar but independent of each other, at each sideof the frame. Each of these intermediate carriages is preferably formedwith two wheels 19 rolling upon rails formed upon the inside faces ofthe individual plates'of the tractor chains. These wheels are looselymounted upon axles 2O fitted between the mountiug plates 21 which inturn are pivotally mounted upon axles 22' carried at the ends of theleaf spring 23, which spring is fixed at its middle portion to the frame1 by means of a trunnion 2 1 which permits the spring to rock freely.

l'noperation the'weight of the frame 1 and of the parts fastened to itis distributed on the five springs, 12, 1'8 and 23, and thus the fourcarriages and the tractor chains under them are enabled to accommodatethemselves to irregularities of the ground.

The steering of the tractor is accomplished by changing the relativemovement of the two tractor chains which are independently driven andthe entire operation is controlled by means of the speed changing andreversing gears which are shown in Figures at, 5, (3 and 7 and comprisethree different parts.

The first parts (Figures i and are sinii-lar and are preferably disposedwithin the rear driving wheels 15. Each of these parts comprises aninternally toothed gear 24 attached concentrically to the rim ofthe'wheel. 15 by rivets or bolts 25; an external toothed gear 26attached concentrically to the hub of Patented Apr. 11, 1922.

whereby the tractor chains the wheel 15 by rivets or bolts 27 and a spurpinion 28 adapted to engage with the preceding gears.

The pinion28 is keyed on a shaft 29- turn ing in a bearing 30 whichbearing is mounted in an eccentric 31 adapted to be moved through a halfturn within a circular opening in the plate or shield 32, which latteris keyed upon the rear axle 16. The eccentrics 31 are controlled by anysuitable means either-With the internally toothed gear. 24 or with thegear 26, thus obtaining two different gear relations. In each positionthe direction of rotation of the pinion 28 determines the direction ofrotation of each corresponding. driving wheel, and the direction ofrota-C1011 of the pinion 28 is determined by the elements shown in Figure 6.Here a crossv shaft 29 is arranged in prolongation of the. shafts 29 andattached to. said shafts by means of Cardan joints, in such a way as towork in various positions. The. twin spur pinion 34 is mounted on thisshaft 29 being keyed thereon and adapted to slide thereon,

. i and may be shifted upon the shaft by a' member 36 operating" in agroove of the pinion and controlled by the-middlehand lever L (Figure1).

Two bevel ed gears 37 and 38 are loosely mounted on the shaft 29 and areprovided at 39 and 40 with internal teeth adapted to engage respectivelywith one or the other. of the parts of the-twin pinion 34, according tothe direction of the. motion of the.

clutch 36-, these gears 37 and 38 are in constant engagement with thebevelled pinion 41' which is keyed on an extension 42 of the mainmotorshaft, so that they are made to revolve in opposite directions. Itwill be seen that the. shaft 29*, and therefore the shafts 29, will bemade to revolve in one direction or another accordingas the pinion 34engages with the'gear 37 or thegear 38.

The whole system is enclosed within a casing 43. attached to the rearaxle casing and between the rear driving wheels insuch a way. that theshaft 29 lies in the prolongation of shafts 29 as above stated.

Two band brakes are applied to the outer rims of the drums of theinternally toothed gears 24. These brakes may be controlled eitherindependently by two pedals or simultaneously by a hand lever.

The shaft 42 is connected to the motor by an intermediate couplingdevice controlled by a pedal.

The speed changing and reversing gear work as follows-(see Figure 7).

The hand levers L L which control the clutch of the pinions 28am placedon opporevolving the. eccentric 31 the shaft site sidesof the hand leverI. which controls the twin pinion 34. In the drawings small blackcircles indicate the respective posit-ions of the-three hand leverscorresponding. to the seven combinations used for manoeuvering thetractor. These combinations are as follows- Combination A- full stop. Iif Combination B-both tractor chains forward on first speed. 7

Combination C.bothchains forwardon second speed.

Combination .D'both chains backward aa first speed.

Combination Eone chain forward at first speed. V Combination F--onechain forward at second speed: and one chainjstoppedi Combination Gr-Onechain backward first speeds-one chain backward at second:

speed.

"In case of combination E; and F the. stop chains can be. jammed bymeans ofthe brake."

These combinations are used when it is (15xsired to turn the tractoronany given curve and the combination G is toturn. the machine n itself.I i h a To. arrange the tractor chains fortravele ling on roads, (seeFigures .8 and 9). met'aL clamps 44 are applied to thesuccessiive bersor links. of the tractor chains and! the outer faces of theseclamps areprovidedwithi masses of rubber or'flsimilar material,- 45; which. arefastened by the rims- 46120 the: clamps. The inner faces of the clampsconform to the outer faces of thelinks47. One. of the fastening edges ofthe'clamp44 is.

bent inward as at 48 to hook over. one, edge.

bolts or latchesol connected to aflat spring 52; fastened on. the clamp,which spring is. slightly bent to. facilitate operation.- latches 51 areprovided with inclinedplanes 53 and are looked under the edge 54 of the;link. In this manner the clamps can be; quickly adjusted, each to. onelink-by a sin Le. thrust of the hand and may be removed pulling the endsof the spring 52 so asl'to, disengage the latches 51 from the edge 54of;

no I

each link. In order to preventlbngitud-inat sliding of the clampsthelinks are. provided with upturned edges 55. H

What is claimed is- V 1. In a tractor, speed changingmeans adapts edforguiding, determiningand coordinating. the movements of the tractorcomb-inin in combination an internally toothed gear fired concentricallywith the felly of the drivin wheel, an externally toothed gear moun onthe hub of the same, a'pinion placed between said gears withits shaftparallel to that of the driving wheels, a mounting! for said shaftcarried by an eccentric supportedon a guard-plate fixedto the drivingwheel 1 30 shaft, manual means for rotating said eccentric, and meansfor rotating said pinions in either direction.

2. In a device of the character set forth in claim 1 hereof, aconnecting rod pivotally connected with said eccentric and a hand leveroperatively connected with said connecting rod.

3. Means for turning the pinion claimed in claim 1 in either direction,comprising in combination a shaft in line with that which carries saidpinion and connected thereto by a flexible joint, a driving pinionhaving two sets of teeth and keyed on said shaft so as to be slidabletherewith, manual means for In testimony whereof I affix my signature 25in presence of two witnesses.

LEON CHARLES MURET. Witnesses:

M. DEBENEDETTI, PETER PETERSEN.

